17231007
Description
Flashcards by Melia Greene, updated more than 1 year ago
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Created by Melia Greene
over 5 years ago
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| Question | Answer |
| What is tension? | A stretching force |
| What is torsion? | A twisting force |
| What is compression? | A pushing force |
| What is a shear force? | Forces that act in opposite directions but aren't aligned |
| What is a bending force? | A force that cause materials to bend under a pressure |
| Lamination | When layers are glued together to increase strength and rigidity |
| Describe strength | A materials ability to withstand a force without breaking. |
| Describe hardness | A materials ability to withstand scratching and abrasion |
| Toughness | If a material is tough it is hard to break or snap |
| Elasticity | A material's ability to stretch and then return to it's original shape |
| Malleability | How easily a material can be bent or shaped |
| Ductility | How easily a material can be drawn into wires |
| Electrical conductivity | How easily can a material pass on an electrical current |
| Thermal conductivity | Can a material easily pass on heat? |
| Materials with a high fusibility have a --- melting point. | LOW. They only need a small amount of heat to convert them to a liquid and make them fuse. Solder has a high fusibility. |
| Density | How much mass is in each unit square. |
| Absorbency | Materials that have a high absorbency are good a soaking up water |
| Non-metals are... | More brittle; less dense; poor conductors; solids at room temperature and dull looking |
| Metals are... | Good conductors; strong; malleable and not very fusible. |
| Alloys are... | a mixture of two more more metals that is developed to have a specific set of characteristics. |
| Planed Square Edge timber (PSE) | Timber that's had it's rough edges taken off so it has smooth corners. |
| Rough sawn timber | It's not smoothed after it's cut and it's cheaper. |
| Mouldings | Timber with various cross sections, used for skirting boards. |
| What stock forms are manufactured boards available in? | 2440 x 1220 mm sheets with thickness between 4-18 mm |
| Why are metals available in a wide range of stock forms? | They can be difficult to convert or shape. |
| What stock forms can metals be found in. (Name 5). | Sheet, strip, bar, rod, tube, angle, U-shaped channel or I-shaped girder. |
| Name 5 stock forms of polymers | Sheet, tube, rod, foam, film, granules or powder. |
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